美国HARSCO有限公司的分公司BMY,在最近举行的美国陆军协会会议期间展出了该公司自已投资研制的一种155毫米榴弹炮国际通用炮塔。自从1974年以来,该公司是为本国用户和外贸市场生产M109型系列的155毫米自行榴弹炮的唯一公司。原来的M109火炮发射标准的M107型榴弹的最大射程是14,600米。1973年投入使用的M109A1有许多改进,其中最重要的改进是加长了炮管,发射同样的M107型榴弹时,最大射程达18,100米。现在的生产型M109A2火炮是1978年由BMY公司 BMY, a subsidiary of HARSCO Inc. of the United States, exhibited at the recent meeting of the U.S. Army Association a self-developed 155mm howitzer international turret. Since 1974, the company has been the only company to produce the M109 Series 155mm howitzer for its own users and foreign markets. The original M109 artillery fired the standard M107 grenade maximum range is 14,600 meters. The M109A1, which went into service in 1973, has many improvements. The most significant improvement is the extension of the barrel, with a maximum range of 18,100 meters when firing the same M107 grenade. The current production M109A2 artillery was 1978 by the BMY company